[POWERPC] Compile fixes for arch/powerpc dcr code

The new dcr code does not currently compile when configured for native
DCR access on ARCH=powerpc. This patch fixes the problems.

Signed-off-by: David Gibson <[e-mail]>
Signed-off-by: Paul Mackerras <[e-mail]>

arch/powerpc/kernel/ppc_ksyms.c

···
 #include <asm/btext.h>
 #include <asm/div64.h>
 #include <asm/signal.h>
+#include <asm/dcr.h>
 
 #ifdef  CONFIG_8xx
 #include <asm/commproc.h>

arch/ppc/kernel/ppc_ksyms.c

···
 #include <asm/div64.h>
 #include <asm/xmon.h>
 #include <asm/signal.h>
+#include <asm/dcr.h>
 
 #ifdef  CONFIG_8xx
 #include <asm/commproc.h>

include/asm-powerpc/dcr.h

···
  * base from the device-tree
  */
 #ifdef CONFIG_PPC_MERGE
+struct device_node;
 extern unsigned int dcr_resource_start(struct device_node *np,
 				       unsigned int index);
 extern unsigned int dcr_resource_len(struct device_node *np,

include/asm-ppc/ibm4xx.h

···
 #define __ASM_IBM4XX_H__
 
 #include <asm/types.h>
+#include <asm/dcr.h>
 
 #ifdef CONFIG_40x
 

include/asm-ppc/reg_booke.h

···
 #ifndef __ASM_PPC_REG_BOOKE_H__
 #define __ASM_PPC_REG_BOOKE_H__
 
-#include <asm/dcr.h>
-
 #ifndef __ASSEMBLY__
 /* Performance Monitor Registers */
 #define mfpmr(rn)	({unsigned int rval; \